n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 64 |
4 | 830 |
5 | 14704 |
6 | 228734 |
7 | 3136144 |
8 | 39450110 |
9 | 468241264 |
10 | 5338397054 |
11 | 59140070224 |
12 | 641540046590 |
13 | 6850671429424 |
14 | 72282030453374 |
15 | 755587489260304 |
16 | 7840735233590270 |
17 | 80889167950995184 |
18 | 830567232465613694 |
19 | 8495462278285810384 |
20 | 86620589245358801150 |
21 | 880864903819470714544 |
[1,4,14,64,830,14704,228734,3136144,39450110, 468241264,5338397054,59140070224,641540046590, 6850671429424,72282030453374,755587489260304, 7840735233590270,80889167950995184, 830567232465613694,8495462278285810384, 86620589245358801150,880864903819470714544] |